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Symantec Product Security: Norton Personal Firewall 2004 ActiveX Control vulnerability



SYM07-007
May 16, 2007

Symantec Norton Personal Firewall 2004 ActiveX Control Buffer Overflow

Risk Impact
Medium 

Affected Products 

Norton Internet Security 2004   
Norton Personal  Firewall 2004

Details

CERT notified Symantec that a buffer overflow exists in an ActiveX Control used 
by Norton Personal Firewall.  The error occurs in the Get() and Set() functions 
used by ISAlertDataCOM, which is part of ISLALERT.DLL.  A successful exploit of 
this vulnerability could potentially allow the remote execution of code on a 
vulnerable system, with the rights of the logged-in user.  


Symantec Response

Symantec product engineers have determined that the issue affects Norton 
Personal Firewall and Norton Internet Security 2004 only.  Product updates to 
correct the problem are available through LiveUpdate.   

To successfully exploit this vulnerability, an attacker would need to entice 
the user to view a specially crafted HTML document.  This type of attack is 
often achieved by sending email containing a link to the malicious site, and 
persuading the recipient to click on the link.  

Symantec is not aware of any customers impacted by this issue, or of any 
attempts to exploit the issue.   

As a part of normal best practices, users should keep vendor-supplied patches 
for all application software and operating systems up-to-date.  Symantec 
recommends any affected customers update their product immediately to protect 
against potential attempts to exploit this vulnerability. 

How to obtain the update

Norton Internet Security and Norton Personal firewall 2004 users who normally 
run manual LiveUpdate to obtain product updates can also obtain this update 
through the same process. 
If you have not previously installed all available product updates, you will 
need to obtain those updates first.  You will need to modify your LiveUpdate 
settings to connect to the archive LiveUpdate server to obtain the previous 
product updates.  

Please see this Knowledgebase article for information: 

How to obtain the programs updates that are archived on Symantec LiveUpdate 
server
http://service1.symantec.com/SUPPORT/sharedtech.nsf/docid/2007010219171513

After you have downloaded and installed all available updates from the archive 
server, you will be able to download the update for this vulnerability.

Mitigation

Symantec has released IPS signatures for the Symantec products listed below, to 
detect attempts to exploit this vulnerability:
  
Symantec Client Security  SU# 62 and later
Norton Internet Security  SU# 50 and later
Symantec Gateway Security SU# 46 and later
Symantec Network Security SU# 81 and later
 

Credit
Symantec would like to thank Will Dormann of the CERT Coordination Center 
(http://www.cert.org/certcc.html) for reporting this issue and coordinating 
with us on the response. 

Future updates to this adivsory, if needed, will be available here:
http://www.symantec.com/avcenter/security/Content/2007.05.16.html


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Symantec Product Security Team

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